At 18.09 hours on 21 Feb 1940 the Loch Maddy (Master William James Park), a straggler from convoy HX-19, was hit by one torpedo from U-57 (Korth) amidships and was abandoned 92 miles south-southwest of Rockall. Four crew members were lost. The master and 34 crew members were picked up by the British destroyer HMS Diana (H 49) (LtCdr E.G. Le Geyt) and landed at Scapa Flow.

At 01.07 hours on 22 February, the drifting Loch Maddy was hit by a coup de grâce from U-23 and broke in two 20 miles 70° from Copinsay, Orkneys. The bow section sank, but the stern section was taken in tow by the British rescue tug HMS St. Mellons (W 81) (Lt H. King) and beached in the Inganess Bay, Orkneys. The cargo was salved and the vessel declared a total loss.